Solar photosphere mixtures for equation of state and opacities

Term mixture regarding solar chemical composition refers to relative
abundances of heavy elements. Abundances of hydrogen and helium cannot be
determined reliably from observations, therefore concentration of these
elements are not taken from observational data. The abundances are usually
presented as numeric relative abundances assuming number of hydrogen atoms
equals 10^12. Numbers in the table below are decimal logarithms of the numeric
abundances. In other words, [C] = 8.56 means that 10^8.56 atoms of oxygen
are related to 10^12 atoms of hydrogen. Table contains only elements which
are abundant enough to be included into opacity and equation of state
computations. If you open original publications (see references below) you'll
find they contain many more elements. First "low-Z abundances" to be published
were AGS05.